package com.project.dao.impls;

import java.sql.*;

public class BaseDao {
//    链接对象
    protected Connection con;
//    sql执行对象
    protected PreparedStatement ps;
//    结果集
    protected ResultSet rs;

    /**
     * 建立链接
     */
    public void setConnection(){
        try {

            Class.forName("com.mysql.jdbc.Driver");
            con = DriverManager.getConnection("jdbc:mysql://localhost:12345/db?characterEncoding=utf-8","root","lovo");

        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 关闭链接
     */
    public void closeConnection(){

            try {
                if (rs==null){
                rs.close();
                }
                if (ps==null){
                    ps.close();
                }
                if (con==null){
                    con.close();
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }

}
